Performs correlation clustering on the data
partitioned according to local correlation dimensionality and builds
a hierarchy of correlation clusters that allows multiple inheritance from the clustering result.

extractCorrelationClusters(Database<V> database,
int dimensionality)
Extracts the correlation clusters and noise from the copac result
and returns a mapping of correlation dimension to maps of clusters within
this correlation dimension.

extractCorrelationClusters

Extracts the correlation clusters and noise from the copac result
and returns a mapping of correlation dimension to maps of clusters within
this correlation dimension. Each cluster is defined by the basis vectors defining
the subspace in which the cluster appears.